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Fringu I, Anghel D, Fratilescu I, Epuran C, Birdeanu M, Fagadar-Cosma E. Nanomaterials Based on 2,7,12,17-Tetra-tert-butyl-5,10,15,20-tetraaza-21H,23H-porphine Exhibiting Bifunctional Sensitivity for Monitoring Chloramphenicol and Co 2. Biomedicines 2024; 12:770. [PMID: 38672126 PMCID: PMC11047853 DOI: 10.3390/biomedicines12040770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 03/20/2024] [Accepted: 03/24/2024] [Indexed: 04/28/2024] Open
Abstract
Monitoring antibiotic retention in human body fluids after treatment and controlling heavy metal content in water are important requirements for a healthy society. Therefore, the approach proposed in this study is based on developing new optical sensors using porphyrin or its bifunctional hybrid materials made with AuNPs to accomplish the accurate detection of chloramphenicol and cobalt. To produce the new optical chloramphenicol sensors, 2,7,12,17-tetra-tert-butyl-5,10,15,20-tetraaza-21H,23H-porphine (TBAP) was used, both alone in an acid medium and as a hybrid material with AuNPs in a water-DMSO acidified environment. The same hybrid material in the unchanged water-DMSO medium was the sensing material used for Co2+ monitoring. The best results of the hybrid materials were explained by the synergistic effects between the TBAP azaporphyrin and AuNPs. Chloramphenicol was accurately detected in the range of concentrations between 3.58 × 10-6 M and 3.37 × 10-5 M, and the same hybrid material quantified Co2+ in the concentration range of 8.92 × 10-5 M-1.77 × 10-4 M. In addition, we proved that AuNPs can be used for the detection of azaporphyrin (from 2.66 × 10-5 M to 3.29 × 10-4 M), making them a useful tool to monitor porphyrin retention after cancer imaging procedures or in porphyria disease. In conclusion, we harnessed the multifunctionality of this azaporphyrin and of its newly obtained AuNP plasmonic hybrids to detect chloramphenicol and Co2+ quickly, simply, and with high precision.
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Affiliation(s)
- Ionela Fringu
- Institute of Chemistry “Coriolan Dragulescu”, Mihai Viteazu Avenue 24, 300223 Timisoara, Romania; (I.F.); (D.A.); (I.F.); (C.E.)
| | - Diana Anghel
- Institute of Chemistry “Coriolan Dragulescu”, Mihai Viteazu Avenue 24, 300223 Timisoara, Romania; (I.F.); (D.A.); (I.F.); (C.E.)
| | - Ion Fratilescu
- Institute of Chemistry “Coriolan Dragulescu”, Mihai Viteazu Avenue 24, 300223 Timisoara, Romania; (I.F.); (D.A.); (I.F.); (C.E.)
| | - Camelia Epuran
- Institute of Chemistry “Coriolan Dragulescu”, Mihai Viteazu Avenue 24, 300223 Timisoara, Romania; (I.F.); (D.A.); (I.F.); (C.E.)
| | - Mihaela Birdeanu
- National Institute for Research and Development in Electrochemistry and Condensed Matter, P. Andronescu Street, No. 1, 300224 Timisoara, Romania;
| | - Eugenia Fagadar-Cosma
- Institute of Chemistry “Coriolan Dragulescu”, Mihai Viteazu Avenue 24, 300223 Timisoara, Romania; (I.F.); (D.A.); (I.F.); (C.E.)
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Lascu A, Vlascici D, Birdeanu M, Epuran C, Fratilescu I, Fagadar-Cosma E. The Influence of the Nature of the Polymer Incorporating the Same A 3B Multifunctional Porphyrin on the Optical or Electrical Capacity to Recognize Procaine. Int J Mol Sci 2023; 24:17265. [PMID: 38139093 PMCID: PMC10743720 DOI: 10.3390/ijms242417265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 12/05/2023] [Accepted: 12/06/2023] [Indexed: 12/24/2023] Open
Abstract
The multifunctionality of an A3B mixed-substituted porphyrin, namely 5-(4-carboxyphenyl)-10,15,20-tris(4-methylphenyl)porphyrin (5-COOH-3MPP), was proven due to its capacity to detect procaine by different methods, depending on the polymer matrix in which it is incorporated. The hybrid nanomaterial containing k-carrageenan and AuNPs (5-COOH-3MPP-k-carrageenan-AuNPs) was able to optically detect procaine in the concentration range from 5.76 × 10-6 M to 2.75 × 10-7 M, with a limit of detection (LOD) of 1.33 × 10-7 M. This method for the detection of procaine gave complementary results to the potentiometric one, which uses 5-COOH-3MPP as an electroactive material incorporated in a polyvinylchloride (PVC) membrane plasticized with o-NPOE. The detected concentration range by this ion-selective membrane electrode is wider (enlarged in the field of higher concentrations from 10-2 to 10-6 M), linearly dependent with a 53.88 mV/decade slope, possesses a detection limit of 7 × 10-7 M, a response time of 60 s, and has a certified stability for a working period of six weeks.
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Affiliation(s)
- Anca Lascu
- Institute of Chemistry “Coriolan Dragulescu”, Mihai Viteazu Ave. 24, 300223 Timisoara, Romania; (A.L.); (C.E.); (I.F.)
| | - Dana Vlascici
- Faculty of Chemistry, Biology, Geography, West University of Timisoara, 4 Vasile Parvan Ave., 300223 Timisoara, Romania;
| | - Mihaela Birdeanu
- National Institute for Research and Development in Electrochemistry and Condensed Matter, Plautius Andronescu Street 1, 300224 Timisoara, Romania;
| | - Camelia Epuran
- Institute of Chemistry “Coriolan Dragulescu”, Mihai Viteazu Ave. 24, 300223 Timisoara, Romania; (A.L.); (C.E.); (I.F.)
| | - Ion Fratilescu
- Institute of Chemistry “Coriolan Dragulescu”, Mihai Viteazu Ave. 24, 300223 Timisoara, Romania; (A.L.); (C.E.); (I.F.)
| | - Eugenia Fagadar-Cosma
- Institute of Chemistry “Coriolan Dragulescu”, Mihai Viteazu Ave. 24, 300223 Timisoara, Romania; (A.L.); (C.E.); (I.F.)
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Birdeanu M, Fratilescu I, Epuran C, Mocanu L, Ianasi C, Lascu A, Fagadar-Cosma E. Nanomaterials Based on Collaboration with Multiple Partners: Zn 3Nb 2O 8 Doped with Eu 3+ and/or Amino Substituted Porphyrin Incorporated in Silica Matrices for the Discoloration of Methyl Red. Int J Mol Sci 2023; 24:ijms24108920. [PMID: 37240266 DOI: 10.3390/ijms24108920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 05/09/2023] [Accepted: 05/16/2023] [Indexed: 05/28/2023] Open
Abstract
Designing appropriate materials destined for the removal of dyes from waste waters represents a great challenge for achieving a sustainable society. Three partnerships were set up to obtain novel adsorbents with tailored optoelectronic properties using silica matrices, Zn3Nb2O8 oxide doped with Eu3+, and a symmetrical amino-substituted porphyrin. The pseudo-binary oxide with the formula Zn3Nb2O8 was obtained by the solid-state method. The doping of Zn3Nb2O8 with Eu3+ ions was intended in order to amplify the optical properties of the mixed oxide that are highly influenced by the coordination environment of Eu3+ ions, as confirmed by density functional theory (DFT) calculations. The first proposed silica material, based solely on tetraethyl orthosilicate (TEOS) with high specific surface areas of 518-726 m2/g, offered better performance as an adsorbent than the second one, which also contained 3-aminopropyltrimethoxysilane (APTMOS). The contribution of amino-substituted porphyrin incorporated into silica matrices resides both in providing anchoring groups for the methyl red dye and in increasing the optical properties of the whole nanomaterial. Two different types of methyl red adsorption mechanisms can be reported: one based on surface absorbance and one based on the dye entering the pores of the adsorbents due to their open groove shape network.
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Affiliation(s)
- Mihaela Birdeanu
- National Institute for Research and Development in Electrochemistry and Condensed Matter, Plautius Andronescu Street 1, 300224 Timisoara, Romania
| | - Ion Fratilescu
- Institute of Chemistry "Coriolan Dragulescu", Mihai Viteazu Ave. 24, 300223 Timisoara, Romania
| | - Camelia Epuran
- Institute of Chemistry "Coriolan Dragulescu", Mihai Viteazu Ave. 24, 300223 Timisoara, Romania
| | - Liviu Mocanu
- National Institute for Research and Development in Electrochemistry and Condensed Matter, Plautius Andronescu Street 1, 300224 Timisoara, Romania
| | - Catalin Ianasi
- Institute of Chemistry "Coriolan Dragulescu", Mihai Viteazu Ave. 24, 300223 Timisoara, Romania
| | - Anca Lascu
- Institute of Chemistry "Coriolan Dragulescu", Mihai Viteazu Ave. 24, 300223 Timisoara, Romania
| | - Eugenia Fagadar-Cosma
- Institute of Chemistry "Coriolan Dragulescu", Mihai Viteazu Ave. 24, 300223 Timisoara, Romania
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Maxim FI, Tanasa E, Mitrea B, Diac C, Skála T, Tanase LC, Ianăși C, Ciocanea A, Antohe S, Vasile E, Fagadar-Cosma E, Stamatin SN. Polymeric Carbon Nitrides for Photoelectrochemical Applications: Ring Opening-Induced Degradation. Nanomaterials (Basel) 2023; 13:1248. [PMID: 37049341 PMCID: PMC10097008 DOI: 10.3390/nano13071248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 03/26/2023] [Accepted: 03/29/2023] [Indexed: 06/19/2023]
Abstract
Active and stable materials that utilize solar radiation for promoting different reactions are critical for emerging technologies. Two of the most common polymeric carbon nitrides were prepared by the thermal polycondensation of melamine. The scope of this work is to investigate possible structural degradation before and after photoelectrochemical testing. The materials were characterized using synchrotron radiation and lab-based techniques, and subsequently degraded photoelectrochemically, followed by post-mortem analysis. Post-mortem investigations reveal: (1) carbon atoms bonded to three nitrogen atoms change into carbon atoms bonded to two nitrogen atoms and (2) the presence of methylene terminals in post-mortem materials. The study concludes that polymeric carbon nitrides are susceptible to photoelectrochemical degradation via ring opening.
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Affiliation(s)
| | - Eugenia Tanasa
- Department of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Material Science, University POLITEHNICA of Bucharest, 060042 Bucharest, Romania
| | - Bogdan Mitrea
- 3Nano-SAE Research Centre, University of Bucharest, Atomistilor 405, 077125 Magurele, Romania
| | - Cornelia Diac
- 3Nano-SAE Research Centre, University of Bucharest, Atomistilor 405, 077125 Magurele, Romania
| | - Tomáš Skála
- Department of Surface and Plasma Science, Charles University, V Holešovičkách 2, 18000 Prague, Czech Republic
| | | | - Cătălin Ianăși
- “Coriolan Drăgulescu” Institute of Chemistry, Mihai Viteazul Ave. 24, 300223 Timisoara, Romania
| | - Adrian Ciocanea
- Hydraulics and Environmental Engineering Department, University POLITEHNICA of Bucharest, 060042 Bucharest, Romania
| | - Stefan Antohe
- Faculty of Physics, University of Bucharest, Atomistilor 405, 077125 Magurele, Romania
- Academy of Romanian Scientists (AOSR), Ilfov No 3, 050094 Bucharest, Romania
| | - Eugeniu Vasile
- Department of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Material Science, University POLITEHNICA of Bucharest, 060042 Bucharest, Romania
| | - Eugenia Fagadar-Cosma
- “Coriolan Drăgulescu” Institute of Chemistry, Mihai Viteazul Ave. 24, 300223 Timisoara, Romania
| | - Serban N. Stamatin
- 3Nano-SAE Research Centre, University of Bucharest, Atomistilor 405, 077125 Magurele, Romania
- Faculty of Physics, University of Bucharest, Atomistilor 405, 077125 Magurele, Romania
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Taranu BO, Fagadar-Cosma E. The pH Influence on the Water-Splitting Electrocatalytic Activity of Graphite Electrodes Modified with Symmetrically Substituted Metalloporphyrins. Nanomaterials (Basel) 2022; 12:3788. [PMID: 36364562 PMCID: PMC9656975 DOI: 10.3390/nano12213788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 10/19/2022] [Accepted: 10/24/2022] [Indexed: 06/16/2023]
Abstract
Hydrogen, considered to be an alternative fuel to traditional fossil fuels, can be generated by splitting water molecules into hydrogen and oxygen via the use of electrical energy, in a process whose efficiency depends directly on the employed catalytic material. The current study takes part in the relentless search for suitable and low-cost catalysts relevant to the water-splitting field by investigating the electrocatalytic properties of the O2 and H2 evolution reactions (OER and HER) of two metalloporphyrins: Zn(II) 5,10,15,20-tetrakis(4-pyridyl)-porphyrin and Co(II) 5,10,15,20-tetrakis(3-hydroxyphenyl)-porphyrin. The TEM/STEM characterisation of the porphyrin samples obtained using different organic solvents revealed several types of self-assembled aggregates. The HER and OER experiments performed on porphyrin-modified graphite electrodes in media with different pH values revealed the most electrocatalytically active specimens. For the OER, this specimen was the electrode manufactured with one layer of Co-porphyrin applied from dimethylsulfoxide, exhibiting an overpotential of 0.51 V at i = 10 mA/cm2 and a Tafel slope of 0.27 V/dec. For the HER, it was the sample obtained by drop casting one layer of Zn-porphyrin from N,N-dimethylformamide that displayed a HER overpotential of 0.52 V at i = -10 mA/cm2 and a Tafel slope of 0.15 V/dec.
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Affiliation(s)
- Bogdan-Ovidiu Taranu
- National Institute for Research and Development in Electrochemistry and Condensed Matter, Dr. A. Paunescu Podeanu Street No. 144, 300569 Timisoara, Romania
| | - Eugenia Fagadar-Cosma
- Institute of Chemistry “Coriolan Dragulescu”, Mihai Viteazu Ave. 24, 300223 Timisoara, Romania
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Fratilescu I, Lascu A, Taranu BO, Epuran C, Birdeanu M, Macsim AM, Tanasa E, Vasile E, Fagadar-Cosma E. One A3B Porphyrin Structure—Three Successful Applications. Nanomaterials 2022; 12:nano12111930. [PMID: 35683785 PMCID: PMC9182125 DOI: 10.3390/nano12111930] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 05/26/2022] [Accepted: 06/03/2022] [Indexed: 11/16/2022]
Abstract
Porphyrins are versatile structures capable of acting in multiple ways. A mixed substituted A3B porphyrin, 5-(3-hydroxy-phenyl)-10,15,20-tris-(3-methoxy-phenyl)-porphyrin and its Pt(II) complex, were synthesised and fully characterised by 1H- and 13C-NMR, TLC, UV-Vis, FT-IR, fluorescence, AFM, TEM and SEM with EDX microscopy, both in organic solvents and in acidic mediums. The pure compounds were used, firstly, as sensitive materials for sensitive and selective optical and fluorescence detection of hydroquinone with the best results in the range 0.039–6.71 µM and a detection limit of 0.013 µM and, secondly, as corrosion inhibitors for carbon–steel (OL) in an acid medium giving a best performance of 88% in the case of coverings with Pt-porphyrin. Finally, the electrocatalytic activity for the hydrogen and oxygen evolution reactions (HER and OER) of the free-base and Pt-metalated A3B porphyrins was evaluated in strong alkaline and acidic electrolyte solutions. The best results were obtained for the electrode modified with the metalated porphyrin, drop-casted on a graphite substrate from an N,N-dimethylformamide solution. In the strong acidic medium, the electrode displayed an HER overpotential of 108 mV, at i = −10 mA/cm2 and a Tafel slope value of 205 mV/dec.
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Affiliation(s)
- Ion Fratilescu
- Institute of Chemistry “Coriolan Dragulescu”, Mihai Viteazu Ave. 24, 300223 Timisoara, Romania; (I.F.); (A.L.); (C.E.)
| | - Anca Lascu
- Institute of Chemistry “Coriolan Dragulescu”, Mihai Viteazu Ave. 24, 300223 Timisoara, Romania; (I.F.); (A.L.); (C.E.)
| | - Bogdan Ovidiu Taranu
- National Institute for Research and Development in Electrochemistry and Condensed Matter, Plautius Andronescu Street 1, 300224 Timisoara, Romania;
- Correspondence: (B.O.T.); (E.F.-C.)
| | - Camelia Epuran
- Institute of Chemistry “Coriolan Dragulescu”, Mihai Viteazu Ave. 24, 300223 Timisoara, Romania; (I.F.); (A.L.); (C.E.)
| | - Mihaela Birdeanu
- National Institute for Research and Development in Electrochemistry and Condensed Matter, Plautius Andronescu Street 1, 300224 Timisoara, Romania;
| | - Ana-Maria Macsim
- Institute of Macromolecular Chemistry “Petru Poni”, Grigore Ghica Vodă Alley, No. 41A, 700487 Iasi, Romania;
| | - Eugenia Tanasa
- Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Splaiul Independentei 313, Sector 6, 060042 Bucharest, Romania; (E.T.); (E.V.)
| | - Eugeniu Vasile
- Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Splaiul Independentei 313, Sector 6, 060042 Bucharest, Romania; (E.T.); (E.V.)
| | - Eugenia Fagadar-Cosma
- Institute of Chemistry “Coriolan Dragulescu”, Mihai Viteazu Ave. 24, 300223 Timisoara, Romania; (I.F.); (A.L.); (C.E.)
- Correspondence: (B.O.T.); (E.F.-C.)
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Birdeanu M, Fratilescu I, Epuran C, Murariu AC, Socol G, Fagadar-Cosma E. Efficient Decrease in Corrosion of Steel in 0.1 M HCl Medium Realized by a Coating with Thin Layers of MnTa2O6 and Porphyrins Using Suitable Laser-Type Approaches. Nanomaterials 2022; 12:nano12071118. [PMID: 35407236 PMCID: PMC9000784 DOI: 10.3390/nano12071118] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 03/18/2022] [Accepted: 03/23/2022] [Indexed: 02/01/2023]
Abstract
The purpose of this research is to meet current technical and ecological challenges by developing novel steel coating systems specifically designed for mechanical equipment used in aggressive acid conditions. Homogeneous sandwich-type layered films on the surface of steel electrodes were realized using a pseudo-binary oxide, MnTa2O6, and two different substituted porphyrin derivatives, namely: 5-(4-carboxy-phenyl)-10,15,20-tris (4-methyl-phenyl)-porphyrin and 5-(4-methyl-benzoate)-10,15,20-tris (4-methyl-phenyl)-porphyrin, which are novel investigated compound pairs. Two suitable laser strategies, pulsed laser deposition (PLD) and matrix-assisted pulsed laser evaporation (MAPLE), were applied in order to prevent porphyrin decomposition and to create smooth layers with low porosity that are extremely adherent to the surface of steel. The electrochemical measurements of corrosion-resistant coating performance revealed that in all cases in which the steel electrodes were protected, a significant value of corrosion inhibition efficiency was found, ranging from 65.6 to 83.7%, depending on the nature of the porphyrin and its position in the sandwich layer. The highest value (83.7%) was obtained for the MAPLE/PLD laser deposition of 5-(4-carboxy-phenyl)-10,15,20-tris (4-methyl-phenyl)-porphyrin/MnTa2O6(h), meaning that the inhibitors adsorbed and blocked the access of the acid to the active sites of the steel electrodes.
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Affiliation(s)
- Mihaela Birdeanu
- National Institute for Research and Development in Electrochemistry and Condensed Matter, Plautius Andronescu Street 1, 300224 Timisoara, Romania;
| | - Ion Fratilescu
- Institute of Chemistry “Coriolan Dragulescu”, Mihai Viteazu Ave. 24, 300223 Timisoara, Romania; (I.F.); (C.E.)
| | - Camelia Epuran
- Institute of Chemistry “Coriolan Dragulescu”, Mihai Viteazu Ave. 24, 300223 Timisoara, Romania; (I.F.); (C.E.)
| | - Alin Constantin Murariu
- National Research & Development Institute for Welding and Material Testing—ISIM, Mihai Viteazu Ave. 30, 300222 Timisoara, Romania;
| | - Gabriel Socol
- National Institute for Laser, Plasma and Radiation Physics, 409 Atomiştilor Street, 077125 Măgurele, Romania;
| | - Eugenia Fagadar-Cosma
- Institute of Chemistry “Coriolan Dragulescu”, Mihai Viteazu Ave. 24, 300223 Timisoara, Romania; (I.F.); (C.E.)
- Correspondence:
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Fringu I, Lascu A, Macsim AM, Fratilescu I, Epuran C, Birdeanu M, Fagadar-Cosma E. Pt(II)-A2B2 metalloporphyrin-AuNPS hybrid material suitable for optical detection of 1-anthraquinonsulfonic acid. Chem Pap 2022. [DOI: 10.1007/s11696-021-02047-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Tanasa E, Maxim FI, Erniyazov T, Iacob MT, Skála T, Tanase LC, Ianăși C, Moisescu C, Miron C, Ardelean I, Antohe VA, Fagadar-Cosma E, Stamatin SN. Beyond Nitrogen in the Oxygen Reduction Reaction on Nitrogen-Doped Carbons: A NEXAFS Investigation. Nanomaterials (Basel) 2021; 11:1198. [PMID: 34062800 PMCID: PMC8147284 DOI: 10.3390/nano11051198] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 04/28/2021] [Accepted: 04/29/2021] [Indexed: 11/16/2022]
Abstract
Polymer electrolyte membrane fuel cells require cheap and active electrocatalysts to drive the oxygen reduction reaction. Nitrogen-doped carbons have been extensively studied regarding their oxygen reduction reaction. The work at hand looks beyond the nitrogen chemistry and brings to light the role of oxygen. Nitrogen-doped nanocarbons were obtained by a radio-frequency plasma route at 0, 100, 250, and 350 W. The lateral size of the graphitic domain, determined from Raman spectroscopy, showed that the nitrogen plasma treatment decreased the crystallite size. Synchrotron radiation photoelectron spectroscopy showed a similar nitrogen chemistry, albeit the nitrogen concentration increased with the plasma power. Lateral crystallite size and several nitrogen moieties were plotted against the onset potential determined from oxygen reduction reaction curves. There was no correlation between the electrochemical activity and the sample structure, as determine from Raman and synchrotron radiation photoelectron spectroscopy. Near-edge X-ray absorption fine structure (NEXAFS) was performed to unravel the carbon and nitrogen local structure. A difference analysis of the NEXAFS spectra showed that the oxygen surrounding the pyridinic nitrogen was critical in achieving high onset potentials. The work shows that there were more factors at play, other than carbon organization and nitrogen chemistry.
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Affiliation(s)
- Eugenia Tanasa
- Faculty of Applied Chemistry and Materials Science, Politehnica University of Bucharest, Splaiul Independentei Str. No. 313, 060042 Bucharest, Romania;
| | - Florentina Iuliana Maxim
- Nano-SAE Research Centre, University of Bucharest, Atomistilor 405, 077125 Magurele, Ilfov, Romania; (F.I.M.); (T.E.); (M.-T.I.)
| | - Tugce Erniyazov
- Nano-SAE Research Centre, University of Bucharest, Atomistilor 405, 077125 Magurele, Ilfov, Romania; (F.I.M.); (T.E.); (M.-T.I.)
| | - Matei-Tom Iacob
- Nano-SAE Research Centre, University of Bucharest, Atomistilor 405, 077125 Magurele, Ilfov, Romania; (F.I.M.); (T.E.); (M.-T.I.)
| | - Tomáš Skála
- Department of Surface and Plasma Science, Charles University, V Holešovičkách 2, 18000 Prague, Czech Republic;
| | - Liviu Cristian Tanase
- National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Ilfov, Romania;
| | - Cătălin Ianăși
- “Coriolan Drăgulescu” Institute of Chemistry, Mihai Viteazul Ave. 24, 300223 Timisoara, Romania; (C.I.); (E.F.-C.)
| | - Cristina Moisescu
- Department of Microbiology, Institute of Biology Bucharest, Splaiul Independenței 296, 060031 Bucharest, Romania; (C.M.); (I.A.)
| | - Cristina Miron
- Faculty of Physics, University of Bucharest, Atomistilor 405, 077125 Magurele, Ilfov, Romania; (C.M.); (V.-A.A.)
| | - Ioan Ardelean
- Department of Microbiology, Institute of Biology Bucharest, Splaiul Independenței 296, 060031 Bucharest, Romania; (C.M.); (I.A.)
| | - Vlad-Andrei Antohe
- Faculty of Physics, University of Bucharest, Atomistilor 405, 077125 Magurele, Ilfov, Romania; (C.M.); (V.-A.A.)
- Institute of Condensed Matter and Nanosciences (IMCN), Université catholique de Louvain (UCLouvain), Place Croix du Sud 1, B-1348 Louvain-la-Neuve, Belgium
| | - Eugenia Fagadar-Cosma
- “Coriolan Drăgulescu” Institute of Chemistry, Mihai Viteazul Ave. 24, 300223 Timisoara, Romania; (C.I.); (E.F.-C.)
| | - Serban N. Stamatin
- Nano-SAE Research Centre, University of Bucharest, Atomistilor 405, 077125 Magurele, Ilfov, Romania; (F.I.M.); (T.E.); (M.-T.I.)
- Faculty of Physics, University of Bucharest, Atomistilor 405, 077125 Magurele, Ilfov, Romania; (C.M.); (V.-A.A.)
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Fratilescu I, Dudás Z, Birdeanu M, Epuran C, Anghel D, Fringu I, Lascu A, Len A, Fagadar-Cosma E. Hybrid Silica Materials Applied for Fuchsine B Color Removal from Wastewaters. Nanomaterials (Basel) 2021; 11:nano11040863. [PMID: 33800627 PMCID: PMC8066414 DOI: 10.3390/nano11040863] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 03/22/2021] [Accepted: 03/24/2021] [Indexed: 01/04/2023]
Abstract
Hybrid materials, with applications in fuchsine B color removal from wastewaters, were obtained by in situ incorporation of platinum nanoparticles and/or Pt-porphyrin derivatives into silica matrices. The inorganic silica matrices were synthesized by the sol-gel method, conducted in acid-base catalysis in two steps and further characterized by Nitrogen porosimetry, Small Angle Neutron Scattering (SANS), Scanning electron microscopy, Atomic force microscopy and UV-vis spectroscopy. All of the investigated silica hybrid materials were 100% efficient in removing fuchsine B if concentrations were lower than 1 × 10-5 M. For higher concentrations, the silica matrices containing platinum, either modified with Pt-metalloporphyrin or with platinum nanoparticles (PtNPs), are the most efficient materials for fuchsine B adsorption from wastewaters. It can be concluded that the presence of the platinum facilitates chemical interactions with the dye molecule through its amine functional groups. An excellent performance of 197.28 mg fuchsine B/g adsorbent material, in good agreement with the best values mentioned in literature, was achieved by PtNPs-silica material, capable of removing the dye from solutions of 5 × 10-4 M, even in still conditions.
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Affiliation(s)
- Ion Fratilescu
- Institute of Chemistry “Coriolan Dragulescu”, Mihai Viteazu Ave. 24, 300223 Timisoara, Romania; (I.F.); (C.E.); (D.A.); (I.F.); (A.L.)
| | - Zoltán Dudás
- Neutron Spectroscopy Department, Centre for Energy Research, Konkoly-Thege Street 29-33, 1121 Budapest, Hungary; (Z.D.); (A.L.)
| | - Mihaela Birdeanu
- National Institute for Research and Development in Electrochemistry and Condensed Matter, P. Andronescu Street 1, 300224 Timisoara, Romania;
| | - Camelia Epuran
- Institute of Chemistry “Coriolan Dragulescu”, Mihai Viteazu Ave. 24, 300223 Timisoara, Romania; (I.F.); (C.E.); (D.A.); (I.F.); (A.L.)
| | - Diana Anghel
- Institute of Chemistry “Coriolan Dragulescu”, Mihai Viteazu Ave. 24, 300223 Timisoara, Romania; (I.F.); (C.E.); (D.A.); (I.F.); (A.L.)
| | - Ionela Fringu
- Institute of Chemistry “Coriolan Dragulescu”, Mihai Viteazu Ave. 24, 300223 Timisoara, Romania; (I.F.); (C.E.); (D.A.); (I.F.); (A.L.)
| | - Anca Lascu
- Institute of Chemistry “Coriolan Dragulescu”, Mihai Viteazu Ave. 24, 300223 Timisoara, Romania; (I.F.); (C.E.); (D.A.); (I.F.); (A.L.)
| | - Adél Len
- Neutron Spectroscopy Department, Centre for Energy Research, Konkoly-Thege Street 29-33, 1121 Budapest, Hungary; (Z.D.); (A.L.)
- Civil Engineering Department, University of Pécs, Boszorkány Street 2, 7624 Pécs, Hungary
| | - Eugenia Fagadar-Cosma
- Institute of Chemistry “Coriolan Dragulescu”, Mihai Viteazu Ave. 24, 300223 Timisoara, Romania; (I.F.); (C.E.); (D.A.); (I.F.); (A.L.)
- Correspondence: or
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Anghel D, Birdeanu M, Lascu A, Epuran C, Fagadar-Cosma E. Amino-substituted porphyrins at the border of hybrid materials generation and platinum nanoparticles detection. Studia UBB Chemia 2020. [DOI: 10.24193/subbchem.2020.2.09] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Anghel D, Lascu A, Epuran C, Fratilescu I, Ianasi C, Birdeanu M, Fagadar-Cosma E. Hybrid Materials Based on Silica Matrices Impregnated with Pt-Porphyrin or PtNPs Destined for CO 2 Gas Detection or for Wastewaters Color Removal. Int J Mol Sci 2020; 21:ijms21124262. [PMID: 32549406 PMCID: PMC7352184 DOI: 10.3390/ijms21124262] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 06/06/2020] [Accepted: 06/15/2020] [Indexed: 12/16/2022] Open
Abstract
Multifunctional hybrid materials with applications in gas sensing or dye removal from wastewaters were obtained by incorporation into silica matrices of either Pt(II)-5,10,15,20-tetra-(4-allyloxy-phenyl)-porphyrin (PtTAOPP) or platinum nanoparticles (PtNPs) alone or accompanied by 5,10,15,20-tetra-(4-allyloxy-phenyl)-porphyrin (TAOPP). The tetraethylorthosilicate (TEOS)-based silica matrices were obtained by using the sol-gel method performed in two step acid-base catalysis. Optical, structural and morphological properties of the hybrid materials were determined and compared by UV-vis, fluorescence and FT-IR spectroscopy techniques, by atomic force microscopy (AFM) and high resolution transmission electron microscopy (HRTEM) and by Brunauer–Emmett–Teller (BET) analysis. PtTAOPP-silica hybrid was the most efficient material both for CO2 adsorption (0.025 mol/g) and for methylene blue adsorption (7.26 mg/g) from wastewaters. These results were expected due to both the ink-bottle mesopores having large necks that exist in this hybrid material and to the presence of the porphyrin moiety that facilitates chemical interactions with either CO2 gas or the dye molecule. Kinetic studies concerning the mechanism of dye adsorption demonstrated a second order kinetic model, thus it might be attributed to both physical and chemical processes.
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Affiliation(s)
- Diana Anghel
- Institute of Chemistry “Coriolan Dragulescu” of Romanian Academy, M. Viteazul Ave, No. 24, 300223 Timisoara, Romania; (D.A.); (C.E.); (I.F.); (C.I.)
| | - Anca Lascu
- Institute of Chemistry “Coriolan Dragulescu” of Romanian Academy, M. Viteazul Ave, No. 24, 300223 Timisoara, Romania; (D.A.); (C.E.); (I.F.); (C.I.)
- Correspondence: or (A.L.); or (E.F.-C.); Tel.: +40-256-491-818 (E.F.-C.)
| | - Camelia Epuran
- Institute of Chemistry “Coriolan Dragulescu” of Romanian Academy, M. Viteazul Ave, No. 24, 300223 Timisoara, Romania; (D.A.); (C.E.); (I.F.); (C.I.)
| | - Ion Fratilescu
- Institute of Chemistry “Coriolan Dragulescu” of Romanian Academy, M. Viteazul Ave, No. 24, 300223 Timisoara, Romania; (D.A.); (C.E.); (I.F.); (C.I.)
| | - Catalin Ianasi
- Institute of Chemistry “Coriolan Dragulescu” of Romanian Academy, M. Viteazul Ave, No. 24, 300223 Timisoara, Romania; (D.A.); (C.E.); (I.F.); (C.I.)
| | - Mihaela Birdeanu
- National Institute for Research and Development in Electrochemistry and Condensed Matter, P. Andronescu Street 1, 300224 Timisoara, Romania;
| | - Eugenia Fagadar-Cosma
- Institute of Chemistry “Coriolan Dragulescu” of Romanian Academy, M. Viteazul Ave, No. 24, 300223 Timisoara, Romania; (D.A.); (C.E.); (I.F.); (C.I.)
- Correspondence: or (A.L.); or (E.F.-C.); Tel.: +40-256-491-818 (E.F.-C.)
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Sebarchievici I, Taranu BO, Rus SF, Fagadar-Cosma E. Electrochemical behaviour and analytical applications of a manganese porphyrin – silica hybrid film prepared by pulsed laser deposition. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114127] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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Fagadar-Cosma E, Lascu A, Shova S, Zaltariov MF, Birdeanu M, Croitor L, Balan A, Anghel D, Stamatin S. X-ray Structure Elucidation of a Pt-Metalloporphyrin and Its Application for Obtaining Sensitive AuNPs-Plasmonic Hybrids Capable of Detecting Triiodide Anions. Int J Mol Sci 2019; 20:ijms20030710. [PMID: 30736413 PMCID: PMC6387073 DOI: 10.3390/ijms20030710] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 02/04/2019] [Accepted: 02/05/2019] [Indexed: 12/26/2022] Open
Abstract
The development of UV–vis spectrophotometric methods based on metalloporphyrins for fast, highly sensitive and selective anion detection, which avoids several of the practical challenges associated with other detection methods, is of tremendous importance in analytical chemistry. In this study, we focused on achieving a selective optical sensor for triiodide ion detection in traces based on a novel hybrid material comprised of Pt(II) 5,10,15,20-tetra(4-methoxy-phenyl)-porphyrin (PtTMeOPP) and gold nanoparticles (AuNPs). This sensor has high relevance in medical physiological tests. The structure of PtTMeOPP was investigated by single crystal X-ray diffraction in order to understand the metal surroundings and the molecule conformation and to assess if it qualifies as a potential sensitive material. It was proven that the Pt-porphyrin generated 1D H-bond supramolecular chains due to the weak C-H···O intermolecular hydrogen bonding. The presence of ordered voids in the crystal encouraged us to use PtTMeOPP as the sensing material for triiodide ion and to enhance its potential in a novel AuNPs/PtTMeOPP hybrid by the synergistic effects provided by the plasmonic gold nanoparticles. The spectrophotometric sensor is characterized by a detection limit of 1.5 × 10−9 M triiodide ion concentration and a remarkable confidence coefficient of 99.98%.
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Affiliation(s)
- Eugenia Fagadar-Cosma
- Institute of Chemistry Timisoara of Romanian Academy, Mihai Viteazu Ave. No. 24, 300223 Timisoara, Romania.
| | - Anca Lascu
- Institute of Chemistry Timisoara of Romanian Academy, Mihai Viteazu Ave. No. 24, 300223 Timisoara, Romania.
| | - Sergiu Shova
- Laboratory of Inorganic Polymers, "Petru Poni" Institute of Macromolecular Chemistry, Aleea Grigore Ghica Voda No. 41A, RO-700487 Iasi, Romania.
| | - Mirela-Fernanda Zaltariov
- Laboratory of Inorganic Polymers, "Petru Poni" Institute of Macromolecular Chemistry, Aleea Grigore Ghica Voda No. 41A, RO-700487 Iasi, Romania.
| | - Mihaela Birdeanu
- National Institute for Research and Development in Electrochemistry and Condensed Matter, P. Andronescu Street, No. 1, 300224 Timisoara, Romania.
| | - Lilia Croitor
- Institute of Chemistry Timisoara of Romanian Academy, Mihai Viteazu Ave. No. 24, 300223 Timisoara, Romania.
| | - Adriana Balan
- 3Nano-SAE Research Center, Faculty of Physics, University of Bucharest, Atomistilor Street, No 405, 077125 Măgurele, Romania.
| | - Diana Anghel
- Institute of Chemistry Timisoara of Romanian Academy, Mihai Viteazu Ave. No. 24, 300223 Timisoara, Romania.
| | - Serban Stamatin
- 3Nano-SAE Research Center, Faculty of Physics, University of Bucharest, Atomistilor Street, No 405, 077125 Măgurele, Romania.
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Alexandrova R, Kalfin R, Tudose R, Fagadar-Cosma E. Comparative cytotoxicity assays performed using a free porphyrin and its Zn(II), Co(II) and Cu() Complexes. Influence of optical and aggregation properties. Studia UBB Chemia 2018. [DOI: 10.24193/subbchem.2018.4.05] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Vlascici D, Plesu N, Fagadar-Cosma G, Lascu A, Petric M, Crisan M, Belean A, Fagadar-Cosma E. Potentiometric Sensors for Iodide and Bromide Based on Pt(II)-Porphyrin. Sensors (Basel) 2018; 18:E2297. [PMID: 30012951 PMCID: PMC6068665 DOI: 10.3390/s18072297] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 07/10/2018] [Accepted: 07/13/2018] [Indexed: 12/24/2022]
Abstract
Pt(II) 5,10,15,20-tetra(4-methoxy-phenyl)-porphyrin (PtTMeOPP) was used in the construction of new ion-selective sensors. The potentiometric response characteristics (slope and selectivity) of iodide and bromide-selective electrodes based on (PtTMeOPP) metalloporphyrin in o-nitrophenyloctylether (NPOE), dioctylphtalate (DOP) and dioctylsebacate (DOS) plasticized poly(vinyl chloride) membranes are compared. The best results were obtained for the membranes plasticized with DOP and NPOE. The sensors have linear responses with near-Nernstian slopes toward bromide and iodide ions and good selectivity. The membrane plasticized with NPOE was electrochemically characterized using the EIS method to determine its water absorption and the diffusion coefficient into the membrane.
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Affiliation(s)
- Dana Vlascici
- Faculty of Chemistry, Biology, Geography, West University of Timisoara, 4 V. Parvan Ave, Timisoara 300223, Romania.
| | - Nicoleta Plesu
- Institute of Chemistry Timişoara of Romanian Academy, 24 M. Viteazul Ave, Timisoara 300223, Romania.
| | - Gheorghe Fagadar-Cosma
- Faculty of Industrial Chemistry and Environmental Engineering, Politehnica University Timisoara, Pta Victoriei 2, Timisoara 300006, Romania.
| | - Anca Lascu
- Institute of Chemistry Timişoara of Romanian Academy, 24 M. Viteazul Ave, Timisoara 300223, Romania.
| | - Mihaela Petric
- Institute of Chemistry Timişoara of Romanian Academy, 24 M. Viteazul Ave, Timisoara 300223, Romania.
| | - Manuela Crisan
- Institute of Chemistry Timişoara of Romanian Academy, 24 M. Viteazul Ave, Timisoara 300223, Romania.
| | - Anca Belean
- Institute of Chemistry Timişoara of Romanian Academy, 24 M. Viteazul Ave, Timisoara 300223, Romania.
| | - Eugenia Fagadar-Cosma
- Institute of Chemistry Timişoara of Romanian Academy, 24 M. Viteazul Ave, Timisoara 300223, Romania.
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Iordache AM, Cristescu R, Fagadar-Cosma E, Popescu AC, Ciucu AA, Iordache SM, Balan A, Nichita C, Stamatin I, Chrisey DB. Histamine detection using functionalized porphyrin as electrochemical mediator. CR CHIM 2018. [DOI: 10.1016/j.crci.2017.05.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Sebarchievici I, Lascu A, Fagadar-Cosma G, Palade A, Fringu I, Birdeanu M, Taranu B, Fagadar-Cosma E. Optical and electrochemical-mediated detection of ascorbic acid using manganese porphyrin and its gold hybrids. CR CHIM 2018. [DOI: 10.1016/j.crci.2017.07.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Fagadar-Cosma E, Tarabukina E, Zakharova N, Birdeanu M, Taranu B, Palade A, Creanga I, Lascu A, Fagadar-Cosma G. Hybrids formed between polyvinylpyrrolidone and an A3
B porphyrin dye: behaviour in aqueous solutions and chemical response to CO2
presence. POLYM INT 2015. [DOI: 10.1002/pi.5047] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Eugenia Fagadar-Cosma
- Institute of Chemistry Timisoara of Romanian Academy; M. Viteazul Ave 24 300223 Timisoara Romania
| | - Elena Tarabukina
- Institute of Macromolecular Compounds; Russian Academy of Sciences; Bolshoy pr. 31 199004 St Petersburg Russia
| | - Natalia Zakharova
- Institute of Macromolecular Compounds; Russian Academy of Sciences; Bolshoy pr. 31 199004 St Petersburg Russia
| | - Mihaela Birdeanu
- Institute of Chemistry Timisoara of Romanian Academy; M. Viteazul Ave 24 300223 Timisoara Romania
- National Institute for Research and Development in Electrochemistry and Condensed Matter; 1 Plautius Andronescu Street 300224 Timisoara Romania
| | - Bogdan Taranu
- Institute of Chemistry Timisoara of Romanian Academy; M. Viteazul Ave 24 300223 Timisoara Romania
- National Institute for Research and Development in Electrochemistry and Condensed Matter; 1 Plautius Andronescu Street 300224 Timisoara Romania
| | - Anca Palade
- Institute of Chemistry Timisoara of Romanian Academy; M. Viteazul Ave 24 300223 Timisoara Romania
| | - Ionela Creanga
- Institute of Chemistry Timisoara of Romanian Academy; M. Viteazul Ave 24 300223 Timisoara Romania
| | - Anca Lascu
- Institute of Chemistry Timisoara of Romanian Academy; M. Viteazul Ave 24 300223 Timisoara Romania
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Vlascici D, Popa I, Chiriac VA, Fagadar-Cosma G, Popovici H, Fagadar-Cosma E. Potentiometric detection and removal of copper using porphyrins. Chem Cent J 2013; 7:111. [PMID: 23829792 PMCID: PMC3708750 DOI: 10.1186/1752-153x-7-111] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2013] [Accepted: 07/02/2013] [Indexed: 11/17/2022] Open
Abstract
Background Copper is an essential trace element with a great importance in industry, environment and biological systems. The great advantage of ion-selective sensors in comparison with other proposed techniques is that they are measuring the free metal ion activity which is responsible for their toxicity. Porphyrins are known to be among the best ionophores in formulation of ion-selective sensors. Results A symmetrically substituted meso-porphyrin, namely: 5,10,15,20-tetrakis(4-allyloxyphenyl)porphyrin (TAPP) was used in the construction of a new copper selective-sensor and was also tested for the removal of copper from waste waters. The potentiometric response characteristics (slope and selectivity) of copper-selective electrodes based on TAPP in o-nitrophenyloctylether (o-NPOE), dioctyl phtalate (DOP) and dioctyl sebacate (DOS) plasticized with poly(vinyl chloride) membranes are compared. Conclusions The best results were obtained for the membrane plasticized with DOP. The sensor has linear response in the range 1x10-7 – 1x10-1 M with 28.4 ± 0.4 mV/decade near-Nernstian slope towards copper ions and presents good selectivity. Due to its chelating nature, the same porphyrin was also tested for the retention of copper from synthetic copper samples, showing a maximum adsorption capacity of 280 mg/g.
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Affiliation(s)
- Dana Vlascici
- Institute of Chemistry Timisoara of Romanian Academy, M, Viteazul Ave, 24, Timisoara, 300223, Romania.
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Tarabukina E, Fagadar-Cosma E, Enache C, Zakharova N, Birdeanu M. Molecular Properties and Aggregation of Porphyrin-modified Polysiloxane in Solutions. J MACROMOL SCI B 2013. [DOI: 10.1080/00222348.2012.755426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Elena Tarabukina
- a Institution of Russian Academy of Sciences Institute of Macromolecular Compounds Russian Academy of Sciences , Saint-Petersburg , Russia
| | | | - Corina Enache
- b Institute of Chemistry Timisoara of Romanian Academy , Timisoara , Romania
| | - Natalia Zakharova
- a Institution of Russian Academy of Sciences Institute of Macromolecular Compounds Russian Academy of Sciences , Saint-Petersburg , Russia
| | - Mihaela Birdeanu
- c National Institute for Research and Development in Electrochemistry and Condensed Matter , Timisoara , Romania
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Iliescu S, Augusti MG, Fagadar-Cosma E, Plesu N, Fagadar-Cosma G, Macarie L, Popa A, Ilia G. Synthesis of new phosphorus-containing (co)polyesters using solid-liquid phase transfer catalysis and product characterization. Molecules 2012; 17:9090-103. [PMID: 22850325 PMCID: PMC6268441 DOI: 10.3390/molecules17089090] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2012] [Revised: 07/12/2012] [Accepted: 07/24/2012] [Indexed: 11/30/2022] Open
Abstract
This paper is directed towards the development of safe, and thermally stable solid polymer electrolytes. Linear phosphorus-containing (co)polyesters are described, including their synthesis, thermal analysis, conductivity, and non-flammability. Polycondensation of phenylphosphonic dichloride (PPD) with poly(ethylene glycol) (PEG 12000) with and without bisphenol A (BA) was carried out using solid-liquid phase transfer catalysis. Potassium phosphate is used as base. Yields in the range of 85.0–88.0%, and inherent viscosities in the range of 0.32–0.58 dL/g were obtained. The polymers were characterized by gel permeation chromatography, FT-IR, 1H- and 31P-NMR spectroscopy and thermal analysis. Their flammability was investigated by measuring limiting oxygen index values. The polymers are flame retardants and begin to lose weight in the 190 °C–231 °C range. Solid phosphorus- containing (co)polyesters were complexed with lithium triflate and the resulting ionic conductivity was determined. Conductivities in the range of 10−7–10−8 S cm−1 were obtained.
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Affiliation(s)
- Smaranda Iliescu
- Institute of Chemistry, Romanian Academy, 24 Mihai Viteazul Bvd., Timisoara 300-223, Romania; (S.I.); (E.F.-C.); (N.P.); (L.M.); (A.P.)
| | - Maite-Gyl Augusti
- Instituto Tecnológico de la Energía, Av. Juan de la Cierva, 24 Parque Tecnológico de Valencia, Paterna 46980 (Valencia), Spain;
| | - Eugenia Fagadar-Cosma
- Institute of Chemistry, Romanian Academy, 24 Mihai Viteazul Bvd., Timisoara 300-223, Romania; (S.I.); (E.F.-C.); (N.P.); (L.M.); (A.P.)
| | - Nicoleta Plesu
- Institute of Chemistry, Romanian Academy, 24 Mihai Viteazul Bvd., Timisoara 300-223, Romania; (S.I.); (E.F.-C.); (N.P.); (L.M.); (A.P.)
| | - Gheorghe Fagadar-Cosma
- Polytechnic University of Timisoara T. Lalescu Street, No. 2, Timisoara 300-223, Romania;
| | - Lavinia Macarie
- Institute of Chemistry, Romanian Academy, 24 Mihai Viteazul Bvd., Timisoara 300-223, Romania; (S.I.); (E.F.-C.); (N.P.); (L.M.); (A.P.)
| | - Adriana Popa
- Institute of Chemistry, Romanian Academy, 24 Mihai Viteazul Bvd., Timisoara 300-223, Romania; (S.I.); (E.F.-C.); (N.P.); (L.M.); (A.P.)
| | - Gheorghe Ilia
- Institute of Chemistry, Romanian Academy, 24 Mihai Viteazul Bvd., Timisoara 300-223, Romania; (S.I.); (E.F.-C.); (N.P.); (L.M.); (A.P.)
- Author to whom correspondence should be addressed; ; ; Tel.: +40-025-649-1818; Fax: +40-025-649-1824
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Fagadar-Cosma E, Fagadar-Cosma G, Vasile M, Enache C. Synthesis, Spectroscopic and Self-Assembling Characterization of Novel Photoactive Mixed Aryl-Substituted Porphyrin. CURR ORG CHEM 2012. [DOI: 10.2174/138527212800194755] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Vlascici D, Pruneanu S, Olenic L, Pogacean F, Ostafe V, Chiriac V, Pica EM, Bolundut LC, Nica L, Fagadar-Cosma E. Manganese(III) porphyrin-based potentiometric sensors for diclofenac assay in pharmaceutical preparations. Sensors (Basel) 2010; 10:8850-64. [PMID: 22163384 PMCID: PMC3230948 DOI: 10.3390/s101008850] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/08/2010] [Revised: 09/14/2010] [Accepted: 09/19/2010] [Indexed: 11/16/2022]
Abstract
Two manganese(III) porphyrins: manganese(III) tetraphenylporphyrin chloride and manganese(III)-tetrakis(3-hydroxyphenyl)porphyrin chloride were tested as ionophores for the construction of new diclofenac-selective electrodes. The electroactive material was incorporated either in PVC or a sol-gel matrix. The effect of different plasticizers and additives (anionic and cationic) on the potentiometric response was studied. The best results were obtained for the PVC membrane plasticized with dioctylphtalate and having sodium tetraphenylborate as a lipophilic anionic additive incorporated. The sensor response was linear in the concentration range 3 × 10(-6) - 1 × 10(-2) M with a slope of -59.7 mV/dec diclofenac, a detection limit of 1.5 × 10(-6) M and very good selectivity coefficients. It was used for the determination of diclofenac in pharmaceutical preparations, by direct potentiometry. The results were compared with those obtained by the HPLC reference method and a good agreement was found between the two methods.
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Affiliation(s)
- Dana Vlascici
- West University of Timisoara, 4 V. Parvan Ave, Timisoara 300223 Timis, Romania; E-Mails: (V.O.); (V.C.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +40-256-592-633; Fax: +40-256-592-620
| | - Stela Pruneanu
- National Institute of Research and Development for Isotopic and Molecular Technologies, 65-103 Donath Street 400293, Cluj-Napoca, Romania; E-Mails: (S.T.); (L.O.); (F.P.)
| | - Liliana Olenic
- National Institute of Research and Development for Isotopic and Molecular Technologies, 65-103 Donath Street 400293, Cluj-Napoca, Romania; E-Mails: (S.T.); (L.O.); (F.P.)
| | - Florina Pogacean
- National Institute of Research and Development for Isotopic and Molecular Technologies, 65-103 Donath Street 400293, Cluj-Napoca, Romania; E-Mails: (S.T.); (L.O.); (F.P.)
| | - Vasile Ostafe
- West University of Timisoara, 4 V. Parvan Ave, Timisoara 300223 Timis, Romania; E-Mails: (V.O.); (V.C.)
| | - Vlad Chiriac
- West University of Timisoara, 4 V. Parvan Ave, Timisoara 300223 Timis, Romania; E-Mails: (V.O.); (V.C.)
| | - Elena Maria Pica
- Technical University of Cluj-Napoca, Faculty of Science and Materials Engineering, 28 Memorandumului Street, 400114, Cluj-Napoca, Romania; E-Mails: (E.M.P.); (L.C.B.)
| | - Liviu Calin Bolundut
- Technical University of Cluj-Napoca, Faculty of Science and Materials Engineering, 28 Memorandumului Street, 400114, Cluj-Napoca, Romania; E-Mails: (E.M.P.); (L.C.B.)
| | - Luminita Nica
- Victor Babes University of Medicine and Pharmacy Timisoara, Revolutiei Ave. No. 9, Timisoara, Romania; E-Mail:
| | - Eugenia Fagadar-Cosma
- Institute of Chemistry—Timişoara of Romanian Academy, 24 M. Viteazul Ave, 300223-Timisoara, Romania; E-Mail;
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Fagadar-Cosma E, Enache C, Vlascici D, Fagadar-Cosma G, Stadler H, Bazylak G. Nanostructured Glasses Based on Hybrid Silica Materials Incorporating a New Asymmetrical Phenyl-Substituted Porphyrin. ACTA ACUST UNITED AC 2009. [DOI: 10.2174/1875038900902030099] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Cretu C, Bucovicean C, Armeanu I, Lacrama AM, Fagadar-Cosma E. Synthesis and Spectroscopic Characterization of Meso-tetra (3-hydroxyphenyl) Porphyrin. Rev Chim 2008. [DOI: 10.37358/rc.08.9.1951] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The preparation of compounds where functionality in the meso-position of the tetrapyrrolic ring is introduced during the formation of the porphyrin represents the main purpose of this work. The synthesis of 5,10,15,20-tetrakis(3-hydroxyphenyl)porphyrin (3-OHPP), by Adler method, implying reaction between m-hydroxybenzaldehyde/ pyrrole/ propionic anhydride at a molar ratio of 1/ 1/ 1, in large excess of propionic acid, as solvent, is presented. The hydroxy-porphyrin was isolated from the reaction mixture by precipitation with hexane and it was purified by column chromatography. The purity of the compound (3-OHPP) was certified by HPLC on polar KROMASIL SI 100 column, using as eluent hexane. The structure was elucidated by 1H-NMR, FT-IR, fluorescence and UV-vis analysis. Photophysical properties were studied by UV-vis, emission and excitation spectra performed in different solvents and in various acid pH-media. The obtained compound represents a precursor for new materials exhibiting opto-electronic properties, useful in PDT therapy and for further applications in solar energy conversion and catalysis.
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Vlascici D, Fagadar-Cosma E, Pica EM, Cosma V, Bizerea O, Mihailescu G, Olenic L. Free Base Porphyrins as Ionophores for Heavy Metal Sensors. Sensors (Basel) 2008; 8:4995-5004. [PMID: 27873797 PMCID: PMC3705483 DOI: 10.3390/s8084995] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2008] [Revised: 08/13/2008] [Accepted: 08/21/2008] [Indexed: 11/16/2022]
Abstract
Two functionalized porphyrins: 5,10,15,20-tetrakis(3,4-dimethoxyphenyl) porphyrin (A) and 5,10,15,20-tetrakis(3-hydroxyphenyl)porphyrin (B) obtained and characterized by us were used as ionophores (I) for preparing PVC-based membrane sensors selective to Ag⁺, Pb2+ and Cu2+. The membranes were prepared using three different plasticizers: (bis(2-ethylhexyl)sebacate (DOS), dioctylphtalate (DOP), o-nitrophenyl octyl ether (NPOE) and potassium tetrakis(4-chlorophenyl)borate (KTClPB) as additive. The functional parameters (linear concentration range, slope and selectivity) of the sensors with membrane composition: (I:PVC:KTClPB:Plasticizer) in different ratios were investigated. The best results were obtained for the membranes in the ratio I:PVC:KTClPB:Plasticizer 10:165:5:330. The influence of pH on the sensors response was studied. The sensors were used for a period of four months and their utility has been tested on synthetic and real samples.
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Affiliation(s)
- Dana Vlascici
- West University of Timisoara, 4 V. Parvan Ave, Timisoara 300223 Timis, Romania.
| | - Eugenia Fagadar-Cosma
- Institute of Chemistry -Timişoara of Romanian Academy, 24 M. Viteazul Ave, 300223-Timisoara, Romania.
| | - Elena Maria Pica
- Technical University of Cluj-Napoca, Faculty of Science and Materials Engineering, 15 Constantin Daicoviciu Street, 400020 Cluj-Napoca, Romania.
| | - Viorica Cosma
- Technical University of Cluj-Napoca, Faculty of Science and Materials Engineering, 15 Constantin Daicoviciu Street, 400020 Cluj-Napoca, Romania.
| | - Otilia Bizerea
- West University of Timisoara, 4 V. Parvan Ave, Timisoara 300223 Timis, Romania.
| | - Gheorghe Mihailescu
- Nationale Institute of Research and Development for Isotopic and Molecular Technologies, 71-103 Donath Street 400293, Cluj-Napoca, Romania.
| | - Liliana Olenic
- Nationale Institute of Research and Development for Isotopic and Molecular Technologies, 71-103 Donath Street 400293, Cluj-Napoca, Romania.
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Fagadar-Cosma E, Cseh L, Badea V, Fagadar-Cosma G, Vlascici D. Combinatorial Synthesis and Characterization of New Asymmetric Porphyrins as Potential Photosensitizers in Photodynamic Therapy. Comb Chem High Throughput Screen 2007; 10:466-72. [PMID: 17896942 DOI: 10.2174/138620707781996385] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Porphyrins play a major role as active photosensitizers in noninvasive optical photodynamic therapy (PDT). In a modular approach, this paper presents a short review of the recent developments of porphyrin structures and materials with improved photosensitizing properties and then presents the synthesis and characterization of a series of new second generation asymmetrical meso-tetraphenylporphyrins varied by substituent in the meta positions of the phenyl rings with either -OH or -OCH3 groups, whereas in the para positions only with -OCH3 groups. The new series of differentially functionalized porphyrins were obtained by a combinatorial multicomponent synthesis (Adler-Longo method) by simultaneously using two different aldehydes: 3,4-dimethoxybenzaldehyde and 3-hydroxybenzaldehyde. The porphyrins were isolated, purified and characterized by HPLC, TLC, UV-vis, fluorescence, MS, 1H-NMR, and 13C-NMR analysis, accompanied by DEPT 135 experiments. Because of the fact that the medium in cancerous tissues is often more acidic than in normal tissues, the capacity of these porphyrins to exist simultaneously in aggregated and protonated forms was also investigated, in tetrahydrofuran (THF) and acid THF-water systems, underlying the changes in the photophysical behaviour. The relative fluorescence quantum yields (Phif) were calculated in comparison with meso-tetraphenylporphyrin (TPP), and the values between 0.14-0.26 were found to be promising for further trials. The series of asymmetrically substituted tetraphenylporphyrins, as the new class of supramolecular materials, are suitable for further functionalization in order to improve their photophysical properties, and they could represent interesting potential PDT photosensitizers.
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Affiliation(s)
- Eugenia Fagadar-Cosma
- Institute of Chemistry Timisoara of Romanian Academy, 24 M. Viteazul Ave, 300223-Timisoara, Romania.
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Fagadar-Cosma E, Ilia G, Fagadar-Cosma G, Vlascici D, Bizerea O, Istratuca G. STUDIES ABOUT SYNTHESIS, CHARACTERIZATION, AND THE EFFECT OF 2-n-PROPYL-3-ETHYL-3-METHYL-1,4,2-BENZOXAZA-PHOSPHORINE-2-OXIDE ON GROWTH PARAMETERS AND CHLOROPHYLL CONTENT OF WHEAT. PHOSPHORUS SULFUR 2004. [DOI: 10.1080/10426500490466256] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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